Creekview Add PD-CS 881031
~
~
October 31, 1988
Nathan D. Maier Consulting Engineers
Three Northpark/8800 N. Central Expwy. Suite 300
Dallas, Texas 75231
Attn: Mr. Peter Staks
Ref: Letter to W.B.J.
October 24, 1988
Dear Peter,
This is to acknowledge receipt of your letter referenced
above. Please note that the design as modified by this
letter is totally unacceptable and I hereby disavow any/all
association and/or approval thereof.
As a registered professional engineer, I would never approve
a design knowing that it was doomed to fail. I am surprised
and disappointed that you and Nathan would offer such a pro-
posal, knowing that the site configuration (90% bend in the
creek channel at the sewer line/easement) is totally incompat-
ible with this proposed 30 ft. long retaining wall. We all
know that the only way this proposed retaining wall will sur-
vive a maximum flow situation (creek water bank full), is to
extend the upstream section of the wall above the major impact
point of the current flow. Your proposal stops the retaining
wall at the center of the impact area of the current flowing
from upstream into the bend of the creek. Therefore, it is
only a matter of time until the accelerated erosion at each
end of the proposed 30 ft retaining wall, cuts behind the
wall and eventually "washes it out".
The city council, mayor and city manager do not want a tempor-
ary solution. They most emphatically do not want the future
liability of repairing, replacing or extending this retaining
wall; which your proposal represents.
Unfortunately the sewer crossing was placed in the bend of the
creek. This location presents numerous problems that otherwise
would never have occurred. As the respon~1ble party, "Nathan
Maier Professional Engineerings! are obligated to correct the
situation pursuant to the TSPE code of ethics. I would rec-
ommend that whatever fix you finally decide upon, you affix
your professional seal and guarantee the design for a period
"".....
Mr. Peter Staks
-2-
""'"
October 31, 1988
of 10 years, certainly this degree of warrenty would be mean-
ingful, especially coming from a firm of your sterling reputa-
tion. No one doubts your ability to design and implement a
proper permanent solution. You may want to consider a 100 ft.
long Gabion such as has been in place, in the bend of the
creek behind the home at 217 Meadowcreek, for the past five
years. Tliis Gabion preserves the natural asthetics of the
area which you refer to in your letter and has provided the
ultimate protection for the creek bank.
WBJ: cj
cc: Mayor
Council Members
City Manager
City Engineer
Sincerely,
nson, P.E.